I have recentlty installed step7 professional v12 but when i create a new project i can't add neither s7-1500 nor s7-300. Only whne i click on s7-1200 it works. Please help me!

Hello,It sounds you just installed STEP 7 Basic to only have access to configure S7 1200 Controllers.To find what have been installed on your system, in project view-->Help-->Installed Software.Share it here for further investigation.